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6' / esapeake Drive Redwood City, CA 94( (650) 3649600 FAX (650) 364-9233 <br /> //////�,�^-��`\\\ <br /> sequoia 404 N. Wiget Lane Walnut Creek, CA 9451 ., (925) 988-9600 FAX (925) 988-9673 <br /> 819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 921 -9600 FAX (916) 921 -0100 <br /> Analytical 1455 McDowell Blvd. North, Ste, D Petaluma, CA 94954 (707) 792- 1865 FAX (707) 792-0342 <br /> VQF 1551 Industrial Road San Carlos, CA 94070-4111 (650) 232-9600 FAX (650) 232-9612 <br /> Gettler-Ryan - Sac Project: Chevron 9-3232, Stockton, CA Sampled: 5/5/99 to 5/6/99 <br /> 3164 Gold Camp Dr., Ste. 240 Project Number: 346463.04 Received: 5/7/99 <br /> Rancho Cordova, CA 95670 Project Manager: Rick Fears Reported: 5/ 14, 19/99 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and NME by DHS LUFT/Quality Control <br /> Sequoia Analytical - Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes' <br /> LCS (continued) 9050133-BSI <br /> Methyl tert-butyl ether 5/ 12/99 0.200 0. 171 mg/kg 70 .0- 130 85 .5 <br /> Surrogate: a.a,a-Tris luorotoluene if 0.200 0. 175 It 60. 0- 140 87.5 <br /> Matrix Spike 9050133-MS1 5905126-01 <br /> Benzene 5/13/99 0.200 ND 0. 161 mg/kg 60.0- 140 80.5 <br /> Toluene it 0.200 ND 0. 180 160.0- 140 90.0 <br /> Ethylbenzene It 0.200 ND 0. 185 it 60.0- 140 92.5 <br /> Xylenes (total) If 0.600 ND 0.513 If 60.0- 140 85.5 <br /> Methyl tert-butyl ether If 0.200 ND 0. 159 " 60.0- 140 79.5 <br /> Surrogate: a,a,a-Triuorotoluene IF 0.200 0. 18/ 60.0-140 90. 5 <br /> Matrix Sp1hp, Duo 90 0 -MSDI 5905126-01 <br /> Benzene 5/13/99 0.200 ND 0. 156 mg/kg 60.0- 140 78.0 25.0 3. 15 <br /> Toluene " 0.200 ND 0. 165 60.0- 140 82:5 25 .0 8.70 <br /> Ethylbenzene IF 0.200 ND 0. 179 60.0- 140 89.5 25.0 3.30 <br /> Xylenes (total) It 0.600 ND 0.496 60.0-140 82.7 25 .0 3.33 <br /> Methyl tert-butyl ether If 0.200 ND 0. 154 60.0- 140 77.0 25 .0 3. 19 <br /> Surrogate: a,a,a-Tr90. 5 <br /> Batch : 9050146 Date Prepared: 5112199 Extraction Methnd : EPA 5030B (McOH) <br /> Blank 9050146-BLKI <br /> Purgeable Hydrocarbons 5/ 12/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND If 0.00500 <br /> Xylenes (total) ND IF 0.00500 <br /> Methyl tert-butyl ether ND " 0.0500 <br /> Surrogate: a,a,a-Triuorotoluene 0.200 0. 182 If 60. 0-140 91. 0 <br /> LCS 9050146-13S1 <br /> Benzene 5/12/99 0.200 0.204 mg/kg 70. 0- 130 102 <br /> Toluene 0.200 0.215 IF 70.0- 130 108 <br /> Ethylbenzene 0.200 0.213 " 70.0- 130 106 <br /> Xylenes (total) If 0.600 0. 646 it 70.0- 130 108 <br /> Methyl tert-butyl ether IF 0.200 0. 199 It 70.0- 130 99.5 <br /> Surrogate: a,a,a-Triuorotoluene " 0. 200 0. 181 It 60. 0-140 90.5 <br /> Matrix Spike 9050146-MSI 5905138-09 <br /> Benzene 5/ 12/99 0.200 ND 0. 170 mg/kg 60.0- 140 85.0 <br /> Toluene It 0.200 ND 0. 183 " 60.0- 140 91 .5 <br /> Ethylbenzene If 0.200 ND 0. 184 It 60.0- 140 92.0 <br /> Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions. <br /> ZZ <br /> Sandra R. Hanson, Client Services Representative Page I 1 of 15 <br />